Neutron scattering investigation of the magnetic order in single crystalline BaFe2As2

M Kofu, Y Qiu, Wei Bao, S-H Lee, S Chang, T Wu, G Wu, X H Chen
2009 New Journal of Physics  
The magnetic structure of BaFe2As2 was completely determined from polycrystalline neutron diffraction measurements soon after the ThCr2Si2-type FeAs-based superconductors were discovered. Both the moment direction and the in-plane antiferromagnetic wavevector are along the longer a-axis of the orthorhombic unit cell. There is only one combined magnetostructural transition at about 140 K. However, a later single-crystal neutron diffraction work reported contradicting results. Here we show
more » ... Here we show neutron diffraction results from a clean single crystal sample, grown by a self-flux method, that support the original polycrystalline work.
doi:10.1088/1367-2630/11/5/055001 fatcat:y5pqc5fo3bc6rmqocwsfhsatwm